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help for ^muxyplot^
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Scatter plots with multiple x and y variables
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^muxyplot^ yvars xvars [weight] [^if^ exp] [^in^ range]
[ ^,^ graph_options ^l^ink ^n^eed^(^string^)^ ]
Description
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^muxyplot^ produces a scatter or twoway plot for yvars versus xvars,
all of which xvars are measured on comparable scales. The number of
yvars must equal the number of xvars. For example,
^muxyplot^ y1 y2 y3 x1 x2 x3
plots y1 versus x1, y2 versus x2 and y3 versus x3, all on the same
scatter plot.
Options
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graph_options are options allowed with ^graph, twoway^. ^connect^ and
^symbol^ refer to the y-axis variables. Note that
1. ^connect(||)^ and ^connect(II)^ are either unusable or
irrelevant.
2. ^sy([_n])^ does not work properly. Instead do something like
^gen id = _n^
^muxyplot^ ... ^, sy(...[id]...) need(id)^
3. As exemplified above, any variables named in options should also
be specified in the ^need^ option.
^link^ connects each sequence of data points for each observation
(x1, y1), (x2, y2), (x3, y3), ... by a segmented straight line. For
example, if each pair of variables refers to a specific time, then
the trajectory of an individual over time may be shown in this way.
^link^ may not be combined with ^connect()^.
^need(^string^)^ specifies variables needed by options and not mentioned
before the options. (Otherwise, those variables would be lost by the
^stack^ included in ^muxyplot^.) Two or more variable names should
be separated by spaces.
Limitation
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^by( ) link total^ is allowed as a combination of options but is not
guaranteed to produce a correct ^total^ graph, because sorting first on
the ^by( )^ variable may have the side-effect of producing spurious
connections between data points.
Examples
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. ^muxyplot wrunoff srunoff wrain17 srain17, c(ss) bands(7)^
. ^muxyplot br60 br70 br80 br90 dr60 dr70 dr80 dr90, link^
. ^regress y1 x1^
. ^predict y1p^
. ^regress y2 x2^
. ^predict y2p^
. ^muxyplot y1 y1p y2 y2p x1 x1 x2 x2, c(.l.l) sy(oipi) sort^
^l2(y1 and y2) b2(x1 and x2)^
Author
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Nicholas J. Cox, University of Durham, U.K.
n.j.cox@@durham.ac.uk
Also see
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On-line: help for @graph@, @muxplot@ (if installed)
Manual: [R] graph